20363939 has 4 divisors (see below), whose sum is σ = 20374224. Its totient is φ = 20353656.

The previous prime is 20363933. The next prime is 20363957. The reversal of 20363939 is 93936302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20363939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20363899 and 20363908.

It is not an unprimeable number, because it can be changed into a prime (20363933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (5093556).

Almost surely, 2^20363939 is an apocalyptic number.

20363939 is a deficient number, since it is larger than the sum of its proper divisors (10285).

20363939 is an equidigital number, since it uses as much as digits as its factorization.

20363939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10284.

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 20363939 is about 4512.6421307256. The cubic root of 20363939 is about 273.0783452192.

The spelling of 20363939 in words is "twenty million, three hundred sixty-three thousand, nine hundred thirty-nine".